<template>
  <view>
    <uni-search-bar
      :radius="100"
      @input="input1"
      cancelButton="none"
    ></uni-search-bar>

    <!-- 搜索建议列表 -->
    <view class="sugg-list" v-if="searchList.length !== 0">
      <view
        class="sugg-item"
        v-for="(item, i) in searchList"
        :key="i"
        @click="gotoDetail(item.goods_id)"
      >
        <view class="goods-name">{{ item.goods_name }}</view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>

    <!-- 搜索历史 -->
    <view class="history-box" v-else>
      <!-- 标题区域 -->
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="cleanHistory"></uni-icons>
      </view>
      <!-- 列表区域 -->
      <view class="history-list">
        <uni-tag
          :text="item"
          v-for="(item, i) in historyList"
          :key="i"
          @click="gotoGoodsList(item)"
        ></uni-tag>
      </view>
    </view>
  </view>
</template>

<script>
export default {
  data() {
    return {
      timer: null,
      kw: '',
      searchList: [],
      // 搜索关键词的历史记录
      historyList: []
    };
  },
  onLoad() {
    this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]');
  },
  methods: {
    gotoGoodsList(item) {
      uni.navigateTo({
        url: '/subpkg/goods_list/goods_list?query=' + item
      });
    },
    cleanHistory() {
      // 清空历史记录
      this.historyList = [];
      uni.removeStorageSync('kw');
    },
    gotoDetail(id) {
      // 跳转详情页
      uni.navigateTo({
        url: '/subpkg/goods_detail/goods_detail?goods_id=' + id
      });
    },
    input1(e) {
      clearTimeout(this.timer);
      this.timer = setTimeout(() => {
        this.kw = e;
        // 请求接口
        this.getSearchList();
      }, 500);
    },
    async getSearchList() {
      if (this.kw === '') {
        // 判断输入内容是否为空
        this.searchList = [];
        return;
      }
      const { data } = await uni.$http.get('/api/public/v1/goods/qsearch', {
        query: this.kw
      });
      if (data.meta.status !== 200) {
        return uni.$showMsg();
      }
      this.searchList = data.message;
      // 把请求过的输入内容存入历史记录的数组最前面
      this.historyList.unshift(this.kw);
      // 数组去重
      this.historyList = [...new Set(this.historyList)];
      // 数据持久化
      uni.setStorageSync('kw', JSON.stringify(this.historyList));
    }
  }
};
</script>

<style lang="scss">
.sugg-list {
  padding: 0 5px;

  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    align-items: center;
    justify-content: space-between;

    .goods-name {
      // 文字不允许换行（单行文本）
      white-space: nowrap;
      // 溢出部分隐藏
      overflow: hidden;
      // 文本溢出后，使用 ... 代替
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}

.history-box {
  padding: 0 5px;

  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }

  .history-list {
    display: flex;
    flex-wrap: wrap;

    .uni-tag {
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
